The 3 dirtiest things in your home - it's not your toilet or keyboard!

Toilet seats, handphones, and your keyboard have been proven to be dirty. But these three supposedly “clean” things may be teeming with germs, too.

Clean Laundry

Your used underwear is dirty—but so is everything you wash after them, according to research from Charles Gerba, Ph.D.,a microbiology professor at the University of Arizona. One load of underwear could leave 100 million E. coli behind in your washing machine, contaminating your next cycle.

The Fix: Not stronger detergent. Crank up the water in your washing machine to between 140 and 150 degrees to kill the germs.

Your New Clothes

You might be paying for poop. When Philip Tierno, Ph.D., the director of microbiology and immunology at New York University tested recently purchased clothing items from stores, he found evidence of skin flora, feces, and respiratory secretions.

The Fix: Wash your new purchases in hot water before wearing them—and wash your hands after shopping.

(image: Livestrong)

Contact Lens Cases

Research from China suggests 34 percent of contact lens cases examined were packed with germs like Serratia and Staphylococcus aureus, which can cause keratitis—an inflammatory eye disease that damages your cornea and can even cause blindness.

Keep your eyes safe by pouring out used solution, rinsing your case in hot water daily, and replacing it every three months.

The Fix: Buy new solution every eight weeks, too: Multipurpose solutions lose a lot of their ability to kill germs after two months, finds other Chinese research.

This story was first published on Men's Health Singapore.